Pattern construction for the numbering of castings



J. MANU July 1 1924.-

- PATTERN CONSTRUCTION FOR THE NUMBEHING OF CASTINGS Filed'June ll.

nrroe/vzy Patented July 1, 1924.

JOHN MANU, 0F DETROIT, MICHIGAN;

PATTERN CONSTRUCTION FOR THE NUMBERING 'OF GASTINGS'.

Application filed June 11, 1921.- Serial No.,476,668.

To all whom it may concern:

Be it known that 1, JOHN MANU, a citizen of the, United States, residingat Detroit, county of \Vayne, State of Michigan, have invented a certainnew and useful Improvement in Pattern Construction for theliumbering ofCastings, and declare the following tobe a full, clear,-and exactdescription of the same, such aswill enable others skilled in the art towhich it pertains to make and use the same, reference being had to theaccompanying drawings, which-form a part of this specification.

This invention relates to pattern construction for numbering castings,and the object of the invention is to provide a pattern, from whichmetal castings are to be made, with a means whereby the castings may beindividually numbered and in a manner in which the numbering is soproduced in a casting as to be practically indestructible with the samebeing readily apparent. A further feature of the invention is involvedin the means whereby the numbers may be readily changed subsequent ,toeach casting being made-therefrom. These and other objects and theseveral novel features of the invention are hereinafter more fullydescribed and claimed and the preferred form of construction of apattern involving my invention is shown in the accompanying drawing inwhich Fig. 1 is a view diagrammatic in form of a pattern indicative of ablock of cylinders as used for instance in internal combustion engines.

Fig. 2 is a section taken through that part of the pattern thereofdevised to permit the numbering.

Fig. 3 is a longitudinal section of the portion of the pattern taken online 3-3 of Fig. 1 and showing the general method of bold ing thenumbers in position.

Fig. 4 is a rear elevation of the plate and fastening means forretaining the numbers in position.

Fig. 5 is a perspective View of the pre ferred form of the numberedblocks.

Heretofore, particularly with internal combustion engines for use inautomobiles and trucks, the engine receives a factory number which isformed thereon by means of a small die. These numbers are readilyobliterated by a file or similar instrument any purchaser of the car.

and other numbersplaced thereon so thatit is not greatly inconvenient,with a motorcar that has been stolen, for the thief to obliterate thefactory numbers and substitute others and thus, greatly hamper; theoflicers of the law in tracing the stolen vehicle. With this invention Ipropose to, produce'o'n the casting a numberzof such size and characteras to position the. same in such relation that the number is mostreadily observed and any attempt at alteration of the number wouldbeimmediately apparent to With thisgeneral aim and object'in view thepattern which may be for a cylinder block, or for a casting of any'otherarticle desired to be numbered, is provided with a slot 1 insome:convenient and observable portion thereof and this slot is formed withinclined upper and lower walls 2 and 3 as will be understood moreclearly from Fig. 2, the wall of the pattern being cut entirely throughfor this purpose. For use in this slot I provide a series of numberedblocks, preferably such as is shown in Fig. 5 on the face 4 of whichoccurs the number extending outwardly from the face thereof. This blockwhich hasthe tapered upper and lower faces 5 and 6 to fit the corresponding faces 2 and 3 of the slot at the rear side may be convenientlyshaped, as by an undercut portion 7, to readily permit grasp ing of thesame between the thumb and finger of the operator. Any quantity ofnumbered blocks may be utilized, the slot being of the necessary lengthas may be required for the numbers to be used and such portion of theslot as is not required for the numbers may be provided with a fillerblock 8 shown in Fig. 3 which has a plain face providing a surfacecoextensive with the faces 4 of the numbered blocks. These blocks areformed as before stated with inclined faces 5 and 6 which prevents theprojection of the face 4 of the block beyond the face 9 for instance ofthe pattern. Any convenient means may be employed to secure thesenumbered blocks.

in position, one of which is here shown which consists of a metal plate10 of a width slightly greater than the width of the slot in the patternand somewhat longer than the slot as will be understood from Fig. 4.This plate is provided with slots 11 and 12 in opposite ends and thepattern is recessed at 13 and 14 at the respective ends of the slot 1 inwhich are pivoted the ends of the retaining bolts 15. These bolts areprovided with wing nuts 16. By loosening these nuts the bolts 15 may beturned to one side in the respective recesses 13 and 14 out of the slots11 and 12 of the retaining plate 10 which permits removal of the plateand consequently provides access to the numbered blocks. All of thisretaining structure is on the in terior of the pattern and the numbersonly on the blocks project beyond the adjacent surface of the patternswhich are thus in position to be impressed in the mold formed by thepattern prior to the casting operation'. The casting taken from the moldthus formed has large numbers appearing on the pattern Which ifeliminated or tampered with will be readily observable and as thenumbers are formed by a projecting part of the casting the eliminationof even one numher would be readily observable and it would bepractically impossible to substitute another number therefor in afinished casting.

The retaining means for the numbered blocks and the filler block orblocks is on the interior of the pattern and thus no part Having thusbriefly described my invention, what I claim is- A numbering means forcastings comprising a pattern having a slot formed in the wall thereof,the slot having oppositely inclined side walls and of less width at thesurface than the interior, a series of blocks bearing numbers in theouter face adapted to make a mold impression and provided with inclinedwalls fitting the inclined walls of the slot each of said blocks havingrecesses formed in the opposite remaining Walls permitting insertion ofthe fingers of the operator to insert or withdraw the same, a lookingbar provided at each end with a slot opening through theend thereof, abolt pivoted at each end of the slot in the Wall of the pattern, thesaid pattern Wall being recessed to permit each bolt to be swungoutwardly to allow the locking bar to be positioned, and a nut forengaging the locking bar at each end when the bolt has been posi-1gioned in the respective slot of the locking In testimony whereof, Isign this specification.

JOHN MANU.

